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Physical Properties Of Chemical Sheet
- Sep 06, 2017 -

     Wood is mainly composed of cellulose, hemicellulose and lignin, cellulose makes it have high tensile strength, lignin has a high compressive strength. The three major element in wood not only makes it elastic, but also has high toughness. Therefore, the wood fiber material and plastic mixed together, and then put it in a dedicated mold, under the conditions of high temperature and pressure, the special processing technology, will be closely linked to form a new wood-plastic composite materials.Chemical Sheet
     The production of wood-plastic composite sheet has the following routes: Extrusion molding process, by single screw or twin-screw extruder extrusion molding, can continuously extrude any length of the plate. The process can be divided into single extrusion and dual-machine composite extrusion plate, composite extrusion is the appearance of wood-plastic sheet in a synchronized extrusion of a layer of pure plastic surface, become a special occasion for the use of wood plastic plate. Hot-Pressing molding process, can form a certain specification of discontinuous plate, processing technology similar to MDF molding process. An extrusion and pressure synchronization process for extrusion process, extruder and press. The sheet length of its forming is larger than that of hot-pressing sheet, and the product is superior to the sheet product of extrusion process.Chemical Sheet
     The key of processing technology control of WPC is to prevent the heat degradation and scorch of plastics and sawdust during the process of mixing and forming, the sawdust is poor in thermal stability of organic matter, wherein hemicellulose and lignin are easily decomposed, and when there is oxygen, 200 ℃ or so is the color of fuming. Chemical Sheet
      Therefore, in the wood-plastic composite plate formulation and technology, the solution of wood powder and plastic resin interface, is the key to the technology. Wood-plastic composite continuous mixing manufacturing technology, is the use of coupling technology, wood powder, sawdust and thermoplastic combination, and the use of continuous mixing technology to make high-strength composite materials, because the use of wood fiber as a reinforcement material, the product in the surface hardness, mechanical strength, pest control, waterproof, dimensional stability is good.Chemical Sheet